Improvement in valves for steam, water



UNITED STATES PATENT OFFICE.

SAMUEL J. AND MELVILLE C. POLAND, OF BOSTON, MASSACHUSETTS, ASSIGNORS TOSAMUEL J FEET, OF SAME PLACE.

IMPROVEMENT IN VALVES FOR STEAM, WATER, &c.

VSpecification forming part of Letters Patent No. 155,811, dated October13, 1874; application tiled March 2,1874.

To all .whom t may concer/n:

Be it knownV that we, SAMUEL J. PEET and MELVILLE C. POLAND, ot' Boston,in the county of Suifolk and State of Massachusetts, have inventedcertain new and useful Improvements in Valves for Steam, Water, Ste.;and do hereby declare the same to he fully described in the followingspecification, and represented in the accompanying drawing.

In the said drawing, Figure l is a vertical, central, and longitudinalsection of a valve constructed in accordance with our invention. Fig. 2is a vertical and longitudinal section of the valve-case, taken so as toexhibit one pair of its vertical ribs. Fig. 3 is a side view of thefalse bonnet. Fig. 4 is al View of the in-4 ner face of one of theduplex valve plates or disks. Fig. 5 a similar view of its fellow plateor disk. Fig. 6 is an endelevation of the duplex valvedisks.

Our invention has reference to that class of valves, in which twoindependent disks or valve-plates are employed to close upon twoopposite valve-seats disposed upon the inner ends of the induction andeduction ports of the duid-passage; and our invention consists in thenovel construction and arrangement of the parts of the valve with eachother, as'

herein described, whereby sundry defects, incident to valves asordinarily constructed, are avoided, and a durable, easily-operated, andeffective valve produced.

In the drawing, A denotes thebody or case of the valve, through which astraight unobstructed passage for the flowage ofsteam, water, dac., ismade. B is the valve-stem,

which is provided at its upper end with a.

hand-wheel, C, and at its lower end has a male screw formed thereon. Thesaid stem extends down through a stuffing box or cap, b, and ascrew-conl'iection, c, which screws at its upper end into thepacking-cap b, and serves to compact the stuffing therein, its lower endscrewing onto the neck of `what I term the false bonnet l). The saidstem has an annular shoulder, d, formed thereon, such shoulder enteringa chamber of corresponding size formed in the neck f of the falsebonnet, the said shoulder, and, of course, the spindle, being kept fromvertical movement their limit of descent, is obviated.

by such chamber and the connector c, which impinges on the upper surfaceof the shoulder, or a washer resting thereon, the same being as shown inFig. l. The false bonnet is of a dome shape having` a flange, g,extending around its lower edge, its base resting uponV an annularshoulder formed on the neck of the valve-case. On the internal surfaceof said neck are disposed a series of ears or lugs, h h, dto., whichcorrespond in length with a series of openings, fit', made in theilanged base of the bonnet, the same allowing the ears to be passedthrough the same and the bonnet to be located upon its seat, when, byslightly moving the bonnet horizontally, the hanged parts thereof willbe caused to impin ge against the under surface of the lugs, and thushold the bonnet in position. E is the cap or bonnet proper, the samebeing arranged upon the neck of the false bonnet, and resting upon theupper end of the valve-case, and being conined in place thereon by thescrew-connector c, hereinbefore mentioned. F F are two valve plates ordisks, the outer faces of which are formed divergent or with a downwardtaper, such taper corresponding with the taper or divergence of theseats Ich of the valve-ports.

,or pivotal action of the disks, suoli as takes place when but a singlewedge is employed to operate the disks. The disk F has also two lugs orshoulders, m m, upon which the bases of the wedges of its fellow diskrest, such serving to connect the two disks, and locating the disk F ona plane a little lower than that of the disk F, by which arrangement theformer disk by its gravity is caused to descend a little in advance ofits fellow,-whereby any setting of the disks, before they have reachedFurthermore each of the disks is provided on its opposite vertical faceswith grooves n n made parallel to the inner faces of the disks. Thesegrooves `receive the vertical parallel ribs o o' o o', which aredisposed on opposite sides of the valve-case, such ribs extending fromthe top of the valve-chamber down until they lose themselves in theperimeter of the chamber, such being as shown in Fig. 2, in which onepair of the ribs is shown.

By thus forming the seats ofthe valve and the faces of the disks withcorresponding angles of divergence, and making the ribs on the sides ofthe shell or case, and the grooves of the disks vertical and parallelwith their inner faces, the disks, on being either raised from or closedon their seats, are thus guided and held out of contact therewith duringtheir entire range of upward and downward movement, thereby preventingall the friction and wear incident to valves, which, while being thusoperated, impinge and slide upon the faces of their seats.

By thus forming the valve with the false bonnet, the screw-connector c,and the cap or bonnet proper, as described, we are enabled to dispensewith the large screw-threads usually formed on the bonnet and theperimeter of the valve-ease, such latter construction being especiallyobjectionable in large valves, as when such become set or rusty, it isalmost impossible to disconnect them Without injury or damagin g eitherthe bonnet or its case.

provided with divergent valve-seats and with i parallel ribs, located onthe shell, as described, the inclined disksiy Ff, having duplex wedgesandparallel grooves formed thereon, as stated, the Whole being arrangedand provided with mechanism for` operating the disks, substantially asset forth.

2. The disks F Ff, formed with duplex Wedges, disposed thereon in mannerand for the purpose set forth.

3. The combination, with the case A, and its cap or bonnet E, of thefalse bonnet D, and the screw-connector c, as and for the purpose setforth.

SAMUEL J. PEET.

MELVILLE C. POLAND.

Witnesses:

F. P. HALE, F. @.HALE.

